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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Buletin Agrohorti Jurnal Hortikultura Indonesia (JHI) Jurnal Agroqua: Media Informasi Agronomi dan Budidaya Perairan Journal of Tropical Crop Science International Journal of Global Operations Research Empowerment Society Indonesian Accounting Research Journal Policy Brief Pertanian, Kelautan, dan Biosains Tropika
Sudradjat
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Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Engineering Environmental Science Mathematics Social Sciences

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Jati Diri Insan Akademik : Jati Diri Insan Akademik IPB, DGB; Sarma, Ma'mun; Damar, Ario; Sudradjat; Tarigan, Suria Darma; Setiyono, Agus; Sumiati; Siregar, Ulfah Juniarti; Hariyadi, Purwiyatno; Hasim; Kolopaking, Lala M.; Fahmi, Idqan; Oktariza, Wawan; Damayanthi, Evy; Setiadi, Mohamad Agus; Nahrowi; Sri Purwaningsih, Sri
Policy Brief Pertanian, Kelautan, dan Biosains Tropika Vol 6 No 2 (2024): Policy Brief Pertanian, Kelautan dan Biosains Tropika
Publisher : Direktorat Kajian Strategis dan Reputasi Akademik IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/agro-maritim.0602.856-862

Abstract

Perguruan tinggi sebagai tempat insan akademik berkiprah saat ini mengalami berbagai tantangan dan ancaman yang dapat mengganggu fungsinya sebagai pusat pengembangan ilmu pengetahuan dan teknologi (iptek), serta menjadi penjaga keberlanjutan peradaban dan moralitas insan akademik agar tidak terdistorsi dan tererosi. Kemajuan teknologi (khususnya teknologi informasi), dekadensi moral global, tekanan ekonomi, orientasi praktis dan fokus pada pencapaian jangka pendek, perubahan paradigma pendidikan serta iklim ketidakpastian, menjadikan nilai-nilai tradisional perguruan tinggi terancam tergeser menjadi mesin penghasil tenaga kerja semata. Perguruan tinggi, yang seharusnya berperan sebagai benteng terakhir penjaga nilai-nilai akademik, serta sebagai agen perubahan (agent of change) yang berorientasi pada nilai kebaikan dan penjaga nilai moral (guardian of value), perlu jati diri insan akademik yang unggul, sehingga peran dan fungsi perguruan tinggi dapat tetap dipertahankan. Untuk memberikan pertimbangan dalam upaya menjaga tersebut, Policy Brief ini disusun melalui serangkaian proses diskusi anggota tim PAH Jati Diri Insan Akademik dan proses FGD yang melibatkan narasumber internal dan eksternal IPB. Policy Brief ini diakhiri dengan rekomendasi yang dapat diusulkan kepada penyelenggara pendidikan tinggi Indonesia agar fungsi perguruan tinggi dan insan akademik dapat tetap terjaga
Assessment of Nitrogen Volatilization and Greenhouse Gas Emissions from Urea with N-stabilizer in a Productive Oil Palm Plantation (Elaeis guineensis Jacq.) Waraqi, Bismo; Agusta, Herdhata Herdhata; Sudradjat; Hariyadi
Journal of Tropical Crop Science Vol. 11 No. 03 (2024): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.11.03.260-267

Abstract

Nitrogen fertilization plays a crucial role in supporting plant growth. However, nitrogen in the soil can be lost through rainwater leaching. To address this issue, the concept of fertilizing N-stabilizer-coated urea was proposed. The aim is to reduce nitrogen loss on the field due to vaporization and minimize greenhouse gas (GHG) emissions. The study was conducted to assess the effectiveness of this N-stabilizer-coated urea in reducing nitrogen loss through vaporization, improving GHG emissions, and its impact on plant growth and leaf quality. The research was conducted at IPB-Cargill Jonggol, Bogor, West Java, oil palm education and research station from August 2021 to March 2022. The experimental design employed a completely randomized block design. The fertilizer treatments included four types of nitrogen fertilizers: urea (46% N), coated urea with N-stabilizer (46% N), ZA (21% N), and NPK (15-15-15, 15% N). Additionally, a control treatment without any fertilizer application was included. All treatments were replicated three times. Data analysis was done using the SAS (Statistical Analysis System) 9.0 program. The F-test was conducted, followed by DMRT (Duncan Multiple Range Test) advanced tests at a 5% error level. The results revealed that urea with N-stabilizer fertilization significantly reduced NH3-vaporization by 53% in the first week compared to the application of normal urea. NH3-vaporization level from ZA and NPK was < 1% compared to urea application. Field application of urea with N-stabilizer showed no significant difference in greenhouse gas emission (GHG) compared to the other nitrogen fertilizer types. The GHG values ranged from 7.10 to 7.29 g CO2-e.m-2 per day. The use of N-stabilizer-coated urea could be an effective approach to minimize nitrogen loss through vaporization and reduce greenhouse gas emissions while maintaining comparable results to other nitrogen fertilizer types in terms of GHG emissions on the field.
Sistem Panen Kelapa Sawit di Sekunyir Estate, Kalimantan Tengah Saputra, Aris Adi; Sudradjat
Buletin Agrohorti Vol. 12 No. 3 (2024): Buletin Agrohorti
Publisher : Departemen Agronomi dan Hortikultura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/agrob.v12i3.54535

Abstract

Palm oil (Elaeis gueenensis Jacq) is an important vegetable oil in Indonesia. Palm oil productivity is influenced by various factors including harvest management. This research had specific objectives to be achieved, namely studying and understanding the management of palm oil harvesting, and analyzing the factors that influence the effectiveness and efficiency of palm oil harvesting. The research was conducted at Sekunyir estate, Central Kalimantan from February to May 2014. Data collection was obtained by direct and indirect methods. Field observations were conducted by following 8 harvesters on the Division of Labour (DOL) system and 4 harvest teams on the 1 Cutter and 2 Carrier (C1R2) system. This research concluded that changing the harvest system from the DOL system to the C1R2 system had a good impact on crop management and the productivity of the harvest team. The C1R2 system had a yield of 5-7% higher than the DOL system in obtaining ripe fruit and had a smaller number of rotten fruits which was around 2.6% compared to the DOL system which reached 8%. Keywords: harvest efficiency, C1R2 system, DOL system, harvesting technique, labor
Manajemen Pemanenan Kelapa Sawit (Elaeis guineensis Jacq.) di Labuhanbatu, Sumatera Utara Idiatsyah, Rully Amelia; Ahmad Junaedi; Sudradjat
Buletin Agrohorti Vol. 12 No. 3 (2024): Buletin Agrohorti
Publisher : Departemen Agronomi dan Hortikultura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/agrob.v12i3.59490

Abstract

Panen merupakan salah satu kegiatan yang penting pada pengelolaan tanaman kelapa sawit. Keberhasilan panen dicapai dengan menghasilkan produktivitas tandan buah yang tinggi dengan kandungan rendemen minyak yang tinggi serta kandungan asam lemak bebas (ALB) yang rendah sehingga manajemen panen harus dilaksanakan secara optimal. Penelitian bertujuan mengevaluasi perencanaan panen, pelaksanaan panen, dan evaluasi panen. Penelitian dilaksanakan di Labuhanbatu, Sumatera Utara dari bulan Januari hingga Mei 2022. Data hasil pengamatan dianalisis menggunakan rata-rata, persentase, dan uji komparatif (t-student) pada taraf 5%. Hasil penelitian menunjukkan rotasi panen terpanjang mencapai 13 hari, sedangkan standar kebun adalah 10 hari. Penggunaan alat pelindung diri (APD) tergolong cukup baik walaupun terdapat beberapa pemanen yang tidak menggunakan helm dan face shield. Kapasitas panen terdapat perbedaan yang signifikan karena pekerja memperoleh basis upah harian yang ditetapkan. Rata-rata AKP sebesar 20.18% dan rata-rata varian sebesar 2.41%. Kebutuhan tenaga panen ideal dengan diperoleh taksasi sebesar 15.61 dan realisasi sebesar 14.20. Transportasi panen relatif singkat dengan rata-rata waktu yang ditempuh 12.13 menit, rata-rata jarak 2.16 km, dan rata-rata kecepatan 10.88 km per jam. Persentase mutu buah sesuai dengan standar kebun dengan tidak ada buah mentah, buah matang 96.74%, buah terlalu matang 2.55%, dan buah busuk 1.71%. Kehilangan hasil di lapangan sebesar 1.88 butir per pokok. Penerapan sistem evaluasi, denda, dan premi panen dilakukan untuk menjaga tercapainya basis dan kualitas panen. Kata kunci: kehilangan hasil, kriteria matang panen, rotasi panen, tenaga panen
TRANSFORMASI INOVASI:PEMANFAATAN LIMBAH BATU BARA MENJADI PUPUK Wentasari, Risa; Zadzali, Helmi; Sidiq, Egi Nur Muhamad; Anam, Khairul; Sridanti, Irma Lisa; Agusta, Herdhata; Sudradjat; Hariyadi; Bintoro, Mochamad Hasjim
Jurnal Agroqua: Media Informasi Agronomi dan Budidaya Perairan Vol 22 No 2 (2024): Jurnal Agroqua
Publisher : University of Prof. Dr. Hazairin, SH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32663/ja.v22i2.4551

Abstract

This literature study aims to review technological developments in the use of coal as fertilizer. The method used in this study is a systematic review. Article searches were carried out using Google Scholar with the keywords "Coal for Fertilizer" and "Pupuk Batu bara". At the end of the search, 14 articles were found consisting of 7 in Indonesian and 7 in English, then a narrative review was carried out. The conclusion of this study is that the use of coal as fertilizer was developed by utilizing low quality coal and coal waste: fly ash, bottom ash, humic acid and brown coal. The technology for using it as fertilizer is carried out by applying simple chemical and organic fertilizers together, or in the form of granular and slowrelease fertilizers.
Pengaruh Pendapatan Asli Daerah (PAD), Dana Perimbangan, Dan Sisa Lebih Perhitungan Anggaran (SiLPA) Terhadap Belanja Modal Pada Pemerintah Kabupaten Bandung Barat Tahun 2014-2021 Ulhaq, Hafizh Dhiya; Sudradjat
Indonesian Accounting Research Journal Vol. 5 No. 2 (2025): Indonesian Accounting Research Journal (Februari 2025)
Publisher : Jurusan Akuntansi Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/iarj.v5i2.5200

Abstract

The main sources that can fill regional finances and can be used as a source of financing for regional expenditures including capital expenditures are Local Own Revenue (PAD), Balancing Funds, and Utilization of Overtime Budget Calculations (SiLPA). This study aims to determine the effect of regional original income, balancing funds, and SiLPA on capital expenditure in West Bandung Regency in 2014-2021. This research is a quantitative research with a descriptive approach. The data to be used comes from the 2014-2021 APBD Realization Report. Data collection techniques in this study used literature study techniques and documentation methods. The method of analysis is descriptive analysis. The prerequisite analysis test uses the classical assumption test, namely the normality test, multicollinearity test, heteroscedasticity, and autocorrelation statistical tests. Multiple regression analysis and hypothesis testing using the coefficient of determination test, t statistical test and f statistical test. The results of the study show that Regional Original Income (PAD), Balancing Funds, and SiLPA both partially and simultaneously have an effect on capital expenditure.
Application of Queue Theory in Campus Transportation at Padjadjaran Jatinangor University Using a Multiserver Queue System Model Aufhar, Ihkam Amalul; Sudradjat; Nahar, Julita
International Journal of Global Operations Research Vol. 6 No. 3 (2025): International Journal of Global Operations Research (IJGOR), August 2025
Publisher : iora

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47194/ijgor.v6i3.386

Abstract

Trasnportation system on campus is an important aspect that supports the mobility of the Academic Community and the relations or partners of Padjadjaran University. Currently, Padjadjaran Jatinangor University provides several public transportation facilities that can be used around campus area, namely conventional motorcycle taxis, Beam electric bicycles, and campus transportation in the form of buses. Based on the results of a survey conducted by the author, campus transportation is a facility of public transportation that is more often used and in demand by the Academic Community compared to the other two facilities of public transportation. This study aims to analyze the performance of the passenger queuing system on that campus transportation using a multiserver queue system model. Data in the arrival rate of bus passenger ( ) and the rate of bus service ( ) were collected through direct observation. The results of the study showed that during the operating hours at 07:00-08:00, routes A, B, and C are optimal with number of buses as many as 5, 5, and 6 respectively. Then, during operating hours at 09:45-10:45, routes B and C are optimal with number of buses each as many as 3 buses. As for route A, it is necessary to reduce the number of buses by 1 piece. Then during operating hours at 13:00-14:00, all routes need to be reduced to 1 bus each.
Enhancing Efficiency Via Digital Marketing and Financial Management of MSME Sari Buah Idaman Abdillah, Fatimah; Tullah, Dewi Sarifah; Sudradjat; Asyifa , Siti; Febriyan; Callista, Christine; Febrian, Jan; Lauwsetia, Chessa Auriel
IMPOWERMENT SOCIETY Vol 8 No 1 (2025): February
Publisher : Institut Teknologi dan Bisnis Widya Gama Lumajang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30741/eps.v8i1.1417

Abstract

The main product of Sari Buah Idaman (SBI), a micro, small, and medium-sized enterprise (MSME) in the food and beverage sector, is nutmeg juice. Currently, only nutmeg seeds have a high economic value, so attention needs to be paid to the utilization of nutmeg flesh in nutmeg juice products. This study aims to describe the impact of training and mentoring from digital marketing and finance on enhancing the knowledge of Sari Buah Idaman members. This quantitative research will use a paired sample t-test, sampling both before and after the training, to explain the influence of training and mentoring. All the participants who became respondents in this study were employees of Sari Buah Idaman. The study's results demonstrate the significant impact of training and assistance in enhancing the understanding of digital technology utilization in the marketing and financial management of Sari Buah Idaman. Through the development of knowledge, MSMEs will continue to grow and succeed.
Optimalisasi Produksi dan Pertumbuhan Tanaman Jahe pada Beberapa Naungan Kurnianingsih, Astuti; Sudradjat; Sudirman Yahya; Suryo Wiyono; Happy Widiastuti
Jurnal Hortikultura Indonesia (JHI) Vol. 13 No. 3 (2022): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jhi.13.3.133-139

Abstract

Jahe (Zingiber officinale) merupakan tumbuhan herba tahunan termasuk famili Zingiberaceae. Rimpang tanaman jahe mengandung dua kelas konstituen: minyak atsiri dan oleoresin, yang bermanfaat untuk mengobati berbagai penyakit seperti; diabetes, tekanan darah tinggi, kanker dan banyak penyakit lainnya. Penelitian ini bertujuan untuk melihat pengaruh naungan terhadap pertumbuhan tanaman, biomassa dan kandungan gingerol. Percobaan dilakukan di Kebun Pendidikan Cikabayan bulan Juli 2021-April 2022. Percobaan ini menggunakan Rancangan Acak Kelompok satu faktor yaitu naungan yang terdiri dari empat taraf yaitu N0 0% (cahaya penuh), dan paranet dengan kerapatan N1 = 25%, N2 = 50% dan N3 = 75%. Setiap perlakuan diulang sebanyak tiga kali, sehingga terdapat 12 unit percobaan, masing-masing unit percobaan memiliki 6 tanaman contoh. Hasil percobaan menunjukkan bahwa pemberian naungan dengan kerapatan 50% dan 75% menghasilkan tinggi tanaman dan jumlah daun jahe tertinggi dibandingkan tanpa naungan dan naungan kerapatan 25%. Komponen biomassa tanaman dipengaruhi oleh pemberian naungan. Pemberian perlakuan naungan tidak berbeda nyata terhadap tebal daun, jumlah stomata dan kerapatan stomata. Perlakuan pemberian naungan terhadap kadar senyawa gingerol pada tanaman jahe memberikan perbedaan yang nyata pada perlakuan naungan 75%, nilai tertinggi terdapat pada perlakuan naungan dengan kerapatan 50% dengan nilai 12.10. Tanaman jahe dapat ditanam dan beradaptasi baik pada intensitas cahaya yang rendah.Kata kunci: biomass, gingerol, intensitas, rimpang
Utilization of Plasma Technology to Control Weed Seed Germination Bukhori, Anwar; Guntoro, Dwi; Sudradjat; Tri Sugiarto, Anto
Journal of Tropical Crop Science Vol. 11 No. 02 (2024): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.11.02.200-205

Abstract

Efforts to reduce herbicide use include employing cold plasma technology, which produces heat energy from UV plasma rays using a combination of electrical power. This research aimed to determine the effectiveness of plasma technology in controlling weeds and to identify the optimal voltage and duration for using cold plasma technology to inhibit seed germination. The study was conducted at the Ecotoxicology Laboratory and Seed Propagation Laboratory of IPB in Bogor, Indonesia, from January to March 2023. It comprised two experiments: (1) testing the voltage and time duration of cold plasma technology and (2) examining the effect of electrode needle distance on mustard seeds. The first experiment followed a completely randomized design with plasma voltage and time duration as the treatments. The second experiment used a single-factor completely randomized design to investigate the electrode needle distance. Each experiment included four replications. The results indicated that a voltage of 140 kV with a duration of 80 seconds could suppress mustard seed germination by up to 100%. Additionally, using an electrode needle distance of 0.5 cm reduced the germination percentage of mustard seeds by up to 100% at 7 and 14 days after treatment.
Co-Authors Agus Setiyono AHMAD JUNAEDI Anam, M. Khairul Ario Damar Astuti Kurnianingsih, Astuti Asyifa , Siti Aufhar, Ihkam Amalul Bintoro, Muhammad Hasjim Bukhori, Anwar Callista, Christine Dwi Guntoro Evy Damayanthi Fatimah Abdillah Febrian, Jan Febriyan Ferdinans, Ferdinans HAPPY WIDIASTUTI Hariyadi Hasim Herdhata Agusta Idiatsyah, Rully Amelia Idqan Fahmi IPB, DGB Julita Nahar, Julita Lala M Kolopaking Lauwsetia, Chessa Auriel M Agus Setiadi Ma'mun Sarma Muhammad Hasjim Bintoro Djoefrie Hasjim Bintoro Djoefrie Nahrowi Oktariza, Wawan Purwiyatno Hariyadi Rian Prasetyo Risa Wentasari Saputra, Aris Adi Sidiq, Egi Nur Muhamad Sofyan Zaman Sri Purwaningsih, Sri Sridanti, Irma Lisa Sudirman Yahya Sumiati Suria Darma Tarigan Suryo Wiyono Tri Sugiarto, Anto Tullah, Dewi Sarifah Ulfah Juniarti Siregar Ulhaq, Hafizh Dhiya Waraqi, Bismo Widiastuti, Natalia Puteri Zadzali, Helmi